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| calcium signaling ： ウィキペディア英語版 |
calcium signaling
Calcium ions are important for cellular signalling, as once they enter the cytosol of the cytoplasm they exert allosteric regulatory effects on many enzymes and proteins. Calcium can act in signal transduction resulting from activation of ion channels or as a second messenger caused by indirect signal transduction pathways such as G protein-coupled receptors.
==Calcium signaling through ion channels==
Movement of calcium ions from the extracellular compartment to the intracellular compartment alters membrane potential. This is seen in the heart, during the plateau phase of ventricular contraction. In this example, calcium acts to maintain depolarization of the heart. Calcium signaling through ion channels is also important in neuronal synaptic transmission.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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